• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 2007.06a
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• pp.411-412
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• 2007

EL (electro luminescent) is generally studied as a large size plane light emitting device and flexible light source because of it's simple manufacturing process. In this experiment, we manufactured flexible white emitting light source using Ni-foil with blue phosphor and color change materials. With increasing the thickness of color change material, the luminance of white emission is increased and the color coordinate of white color was shifted to pure white of (0.317,0.328) by strong emission of color change materials excited by blue excitation spectra. Also the luminance level was 30% higher in white emitting light device than blue only light source.

• Analytical Science and Technology
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• v.27 no.6
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• pp.284-291
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• 2014

The handling process of car indoor air quality is composed of 2 steps of testing. First, assambly part is tested to find a source of car indoor VOCs. Second, cut sample of unit component is tested to find a source material of VOCs emission. If the source material of VOCs emission is found, it can reduce car and assembly part of VOCs by improving material. As cut sample testing has problem of emission from cut surface to find the source of VOCs, it needs to apply unit components testing method. The aim of study is to evaluate VOCs impact factor of unit components in assembly parts. ISO 12219-5 test method reflects not only material effect but also surface area effect by testing unit component without cutting. The unit components of doortrim and console, were tested by ISO12219-5. And it could figure what unit component is main source of VOCs in assembly. And quantity conversion Factor which gets by testing assembly and unit components can be used to make guideline of ISO 12219-5.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 1993.11a
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• pp.55-59
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• 1993

In this study, we developed new process for doping poly-Si film. Sb(antimony) thin film was used as doping source. Sb was evaporated on poly-Si film deposited by LPCVD fallowed by annealing. We investigate sheet resistance variation with annealing temperature and time. Finally we adapted this process to poly-Si TFT fabrication.

• Journal of Software Assessment and Valuation
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• v.17 no.2
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• pp.31-38
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• 2021

In order to analyze the similarity of the source code object material, the source code on both sides must be able to be compiled and executed. In particular, in the case of hardware-integrated software, it is necessary to check whether the hardware interface matches. However, currently, the source code is provided in an incomplete state which is not original of source code used in developing steps. The complainant confirms that the executing characteristics are similar to their own in the expression and function of the output, and request an evaluation. When a source code compilation error occurs during the evaluation process, the experts draw a flowchart of the source code and applies the method of tracing the code flow for each function as indirect method. However, this method is indirect and the subjective judgment is applied, so there is concern about the contention of objectivity in the similarity evaluation result. In this paper, the problems of unverified source code similarity analysis and improvement directions are dealt with, through the analysis cases of source code disputes applied to embedded systems.

• Proceedings of the KIEE Conference
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• 2011.07a
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• pp.1404-1404
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• 2011

Shortage of fossil fuel energy makes current industry to find a new energy sources. One of the solutions is using the renewable energy sources like wind, sun, water, and so on. If we think with flex idea, the existing PV system's role can be greatly changed. So in this paper, I want to suggest some ideas for PV systems as one of outstanding energy source. The specific and technical explanation will be shown in the following paper in detail.

• Journal of KSNVE
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• v.11 no.2
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• pp.221-225
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• 2001

In order to make a quiet zone, one can consider various methods. Of the methods, this paper deals with the method using control materials such as absorption materials. This method controls sound fields by changing boundary conditions. First, this paper shows that the control material is essentially on the same road as active noise control (ANC) That is, we can consider the control material as the control source of ANC. However we cannot control the source strength. Second, this paper shows that the position of the control material is an important variable by a numerical simulation. And the strategy to optimize the position is addressed.

• 한국정보디스플레이학회:학술대회논문집
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• 2009.10a
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• pp.1494-1495
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• 2009

Thin Film Transistor(TFT) having CIS (CuInSe) semiconductor layer was fabricated and characterized. Heavily doped Si was used as a common gate electrode and PECVD Silicon nitride ($SiN_x$) was used as a gate dielectric material for the TFT. Source and drain electrodes were deposited on the $SiN_x$ layer and CIS layer was formed by a direct patterning method between source and drain electrodes. Nanoparticle of CIS material was used as the ink of the direct patterning method.

• Journal of the Korean Vacuum Society
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• v.4 no.S2
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• pp.75-78
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• 1995

Gas source molecular beam epitaxy have been used in the growth of InAlAsAnGaAs MSM-PD structure, in which InAlAs ultra thin layer was used as Schottky barrier enhancement material. High performance MSM-PDs have been constructed on the grown wafer. High breakdown voltage of >30V, low dark current density of $3pA/\mu \textrm{cm}^2$ at 10V bias and fast transient response of <20ps rise time / <40ps FWHM have been measured, which confirm the results that GSMBE is a superior method for the growth of materials with high layer and interfacial quality, especially for InP based InAIAdInGaAs system.

• Nuclear Engineering and Technology
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• v.55 no.8
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• pp.2734-2741
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• 2023

Brachytherapy is a special case of radiotherapy. It should be arranged according to some principles in medical radiation applications and radiation physics. The primary principle is to use as low as reasonably achievable dose in all ionizing radiation applications for diagnostic and therapeutic treatments. Dosimetric distributions are dependent on radioactive source properties and radiation-matter interactions in an absorber medium such as phantom or tissue. In this consideration, the geometrical structure and material of the seed capsule, which surrounds a radioactive material, are directly responsible for isodose profiles and dosimetric functions. In this study, the radiometric properties of capsule material were investigated on dose distribution in a water phantom by changing its nuclear properties using the EGSnrc Monte Carlo (MC) simulation code. Effective atomic numbers of hypothetic mixtures were calculated by using different elements with several fractions for capsule material. Model 6711 brachytherapy seed was modeled by EGSnrc/Dosrcnrc Code and dosimetric functions were calculated. As a result, dosimetric parameters of hypothetic sources have been acquired in large-scale atomic number. Dosimetric deviations between the data of hypothetic seeds and the original one were analyzed. Unit dose (Gy/Particle) distributions belonging to different types of material in seed capsule have remarkably differed from the original capsule's data. Capsule type is major variable to manage the expected dose profile and isodose distribution around a seed. This study shows us systematically varied scale of material type (cross section or effective atomic number dependent) offers selective material usage in production of seed capsules for the expected isodose profile of a specific source.

• 한국정보디스플레이학회:학술대회논문집
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• 2008.10a
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• pp.1171-1174
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• 2008

We studied the properties of vapor flux distributions of nozzle shaped thermal evaporation sources and the factors, which can change the flux distributions such as nozzle structure. We used a simulation and experiment methods for this study. By using the results of our study, we improved the Circular Nozzle Source, which can make uniform thin films without substrate rotation, into more efficient source.